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UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Contributed Surplus [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2012 $ 1,764,319 $ 80,504 $ 654,042 $ 200,000 $ (18,730) $ 848,503
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net Income (Loss) Attributable to Parent 144,533 0 0 0 0 144,533
Dividends (36,479) 0 0 0 0 (36,479)
Grant of share options 332 0 332 0 0 0
Exercise of share options 153 16 243 0 0 (106)
Other Comprehensive Income (Loss), Net of Tax 55,118 0 0 0 55,118 0
Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2013 1,927,976 80,520 654,617 200,000 36,388 956,451
Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2013 1,804,137 80,580 656,018 200,000 (6,757) 874,296
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net Income (Loss) Attributable to Parent (11,239) 0 0 0 0 (11,239)
Dividends (72,513) [1] 0 0 0 0 (72,513) [1]
Grant of share options 241 0 241 0 0 0
Exercise of share options 511 50 769 0 0 (308)
Other Comprehensive Income (Loss), Net of Tax 60,084 0 0 0 60,084 0
Net proceeds from issuance of common units 660,947 [2] 12,650 [2] 648,297 [2] 0 0 0
Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2014 $ 2,442,168 $ 93,280 $ 1,305,325 $ 200,000 $ 53,327 $ 790,236
[1] Cash dividends declared in relation to the quarter ended March 31, 2014 amounting to $36.2 million were paid in July 2014.
[2] Includes additional issue costs of$0.6 millionwhich were paid in July 2014.